Machine for producing seams.



H. Jt DAHL. MACHINE ma YRODUGING sums.

APPLICATICIH ElLED MAY 20` 19M. n

Y ljaenteu Mar, 2, MM5.

H. JK BAEL, Mmmm? ma maximum slums, APPLGATION ULEB hihi' Z, i914.

, Patentef Mar. 2, 1915.

The tsfimmor frame lover 37 is actuateti tiuoiz h an ecoentie andtelescopic connection. `aid lever rocks on a shaft 38. The tensioi'; enthe knives is controlled by the threaded bushings 39. cai-vies thestationery knife 4,0, see lig. li. 'ng :1 cutting edge 4l for 'thebottom ply oi Work :md another cutting edge for the top ply of work,While the arm t3 of the trimmer lei-"er 37 o carries the knife H whichlies e. cutting edge 45 to trim the 'bottom ply of Werl; and eliothercutting edge 3 to trim the top ply `of work.

In ordeiwto properly eefi the top ply of work 4'? at. a uniform speedwith the bottom '20 vertically in the iisual bearings same. Thismeinbei' extends` laterally outply of Work '48, have provided an imEroved topfeeding mechanism more fully ereinafter described. A member 49is secured. to the pressetber '50 so as with the through a slot 5l inan'o\-'erhangii1g portion of the frame and is gui J[ed thereby, see Fig.

1. The downwardly extending portion 52 of this member is slotted toreceive the shank '30 under faooef which .59 thereof enterieg e and isbezit 'at 55 so as 58 of a. supplemental throat plate, see Fig. Llei,`the web 54 of which extends forward to form the neck 58 of thissupplementai throat plete 157, the coperetes' with the lower feed flog lupon the bottom ply of work 4,8 to feed the same tlirougli the me chine,A stitching finge? tee Fig. 14es is "secured in the throat ing ormedoverthe. and tiiereef. The projection 62 thereof extends' 'back of thotrimmer knives mi @revente the threads when forming the stitchesfromoastng back of the same.

The Vweb 5 of the throat plate has. o lepending lug 63 "looted toreceive the stem 64 ofY :i plunger heating SS of the seam ,fiatteningineens and this bearing; is olampe therein by :t sorew am; w zei 37. Thepar 68, also Fig. 'iii-,1e proddetl to eoeive see Fig. l,

- direct the blow of the biet.

`re two-arm ietfe'r Wlmzh is plvetiilly secured thereinY see Figs. l.'and 3. The erm 71 of this lever 5S is coiineeteai to a glimgei so .iteree-ipocete he same ln its healing se' that the ble, e 755i ttf tackedto this plungei' viii?. Strike as desired. This coistiuetien enables thetilting of the plunge? ing; G5 so ite to o o t conter line or on either.'fie the oei line of the vto pi'o.il' fit-atten the spring connectioneminente tli the f it'iei" arm 7i? of the twoerm .lever Gu et.

60 the otile' elid oli tl :sir-iii connect-lori' ia o5 the sameg 'al e.

attachete a proj( tion (7 of the i This spring eomiec' fi 721.- compii@e mvo end bearings 78,-seo t g. 15, ptet-'ir wit-ti Stems 79.(,lia`vfv lmg G tit?, jmfei' to move secure-(i .to the stems so that thisconneetion flexible and time compensates for different thicknesses ei'work passing be- 'tween the plunger blade 7i-3 and a groove formed intrie auxiliary throat plate, Fig. Si. The presser Lai 5G, seo Fig. istubular and tapped to i'eeive the tliieeidef roti S3 which is providedwith o nut 84 Se cured thereon Se te turn this rod 83 to increase ordoofe-.15e the tension on the. coii spring 86, located in i bei, andwhich has one end in eer Liet With the rod S3 and-the other ond withplug S? which is piovifled. with a stem Se extending up into the rd S3as at to guie this plug; The ping is slotted at 90 and hits pivotedthezen a. hanger 91 provided with roilers which form a bearing for thesimula: of the feed ber This foe-d bar is bored to receive crew at 94and-l lougitudiimlly boreal et to receive Aa. spring' 96, having one endsecured. to a. pin 97. The other end of this spring is seeuie at 98 towhich is pivotelly ,Secured in the bei at 100. The stop -pin 101 limitsthe backward movement of this feed tiog. 93 has en opening 3.0i)therethrough so that the needle and neecile mit Wili pass tliiough thesame. The forward enti 103 of tliisi bai' 93 is shaped to pi/votelly litin the slot 104 at the forward end of the top feed 1105 Figs. 2 und;f3', so is to have. ,a slight rocking motion.

The feed movements are trimsmitteai from the feed bei' Slay means ofthe. connection l, Figs. 4 and. 8, and which has its @mi 108 pivot-allysecured to the feed bai 93 at. so that the. feedv will have the usuelfour motions. The backward and forward .feeding motions being in'exaotftime and relation with, the bottom .feed motions, while the iiseand elliixg motion are just opposite to the rise and fall movements ofthe bottom feed so as to' como together amd clamp themeik to fee thesame and move away from one anotlie to release the work for the nextfeeding stroke. in order to Vhold the top ply of Work', I haveprovide-fl a. messe-r foot mechanism comprising o, link lili? pivotallyseemed to the 'member 4.-, see Figs. 2 and fi, tml pivots-illy Seemed atlli? to a. lifting lever lll which z. Glied at 'H3 to o, iu'acket theziiucliine frame.

A. spring 1M is elm seemed in this bieeiet and e Screw li :Mierde ameans of regulating the tenpzmg li to regulate the flowne oi theprecise? foot.

v on apio il? While `the lever lll the pin to automatically' litt thefeeding; takes place. The siottefi at 118 to receive the 1 )lz Sert-mga4 feed dog 99' The feed bar A is pivtally i12 seemed to This whichextends downward and is pivotally Asecured at 121 to the presser foot122 whic .is slotted at 123 to receive the end 124 of the top feed 105.The extending end 126 of the presser foot carries a short tongue whichassists in holding down the edge of the work. The toe of the presserfoot is npturn-ed to facilitate the starting of the top ply while thetop feed 105 rojects befond the supplemental throat p ate 57, see ig.-2, as at 128 to facilitate starting the work and in .turn the underfeed 12 projects beyond the supplemental throat pte 57 for ring 129 kthesame purpose. The lower for the presser foot bar 50 is provided with VaAbushing 130 which is slotted at 131, see lFigs. 1f and 2, to receivethe roller hanger $1 hereinbefore described, see Fig. 5, and guide thesame in its vertical movements.

The operation of the machine is as follows The to 47 and 48 are s lovedup to the feedin mechanism where the I are separated by t e beveledz end132 o the supplemental throat plate. The lower ply 48 passes beneath itand is carried alon bythe under feed 12 while the top ply 4g iscarriedalong above it by the top feed 105. When the work reaches thetrimmer knives, the cutting edges 41 and 45, see Fi 7, open to receivethe bottom ply 48 to tr1m the edge thereof While the edges 42 and 46areo en to receive the top ply 47 to trim the e ge as clearly shown inFig. 1. As the edges are trimmed Zthe t'rimmed edges are diverted by theguard 133 which is secured to the trimmer lever 43 and is in constantmotion with the trimmer knife 44 so that the trimmed edges arelcontinually kept moving and defiected away from the stitchingmechanism. The edges of the trimmed work are then fed one over and theother under, the supplemental throat plate 57, so that the needle willpene-` trate the same in the formation of the stitch,

f whereby the looperthread is carried up over the edges of the workwhere itis caught by the needle and connected on the bottom side of thework with the needle thread.V While the seam is being produced at thepoint of stitch formation, the bead or. joining of the two threads areon a center line with respect to the edge of the work, the needle`thread covering the bottom ply, and the looper thread covering the topply, and as the work progressesthrough the machine the edges of the workare acted upon to make the ends butt. The action of the plun-v ger hasthe effect of flattening the seam and 'at the same time draws the beadof the stitching away from the center lineand at one side thereof as thework comes from the machine. Asthe feeds at upon the work, v`the'presser Ifoot 122 is lifted so that the top *ply may freely passu'nd'er the same and as the feeds `are returning lfor the next feed andbottom plies of work.

motion, thel foot 122 clamps the top'ply of the work on top of thesupplemental throat plate and clam s the bottom ply of the work againstthe un er throat plate 13. The feed 99, see Fig. 5, having teeth 134,also acts on the top ly of work to feed the same back of the nee le, andthis feed is rockable on its pin 100 so that it will yield when passingover seams, e'tc. As thev stitches are produced, the seam formed overthe grooved edge of the supplemental throat plate has substantially theform shown in Fig. v10. As the plunger 73 strikes the same it forces itinto the groove 82 of this throat plate and into the position shown inFig. 9, bringing the ed es of the plies 47 and 48 so they 4abut as inig. 11, so thatv when the work leaves the machine it is open as shown insaid Fig. 11. When the work is laid flat with the kedges abutting, oneside presents the appear.-

ance shown in Fig. 12, while the other side presents the appearanceshown in Fig. 13'.

While I have shown a reci rocating member or plunger to strike and attenthe seam,

it is obvious that other devices could be ada ted to produce similarresults, and whi e I have shown'this fiat seam as producelld on knitgoods or elastic materials I do niet wish to confine myself thereto, asit may@ be equally eiiicient on other classes of work, and therefore thevarious details may be more or less modified without departing' from thespirit/forscope of this improvement.

It will be understood, of course, that the resser bar 50A operates inthe usual bearings providedg'for this purpose, and downward pressure' isgiven thereto by means of the usual spring, not shown, so that pressureof the supplemental throat late .on the bottom ply o work is obtaine breason of its connection with this presser ar, and that as this suplemental throat plate is connected with tii presser foot, it llows thatas the presser bar 50 is lifted the supplemental throat.

'work, of means for turning the stitched4 edges of thelwork between theplies intov abutting relation with each other, said means comprising areclprocating device. p

8. In a sewmg mach1ne,the combination e fpresser bar, as is also the'with stitching mechanism and feeding mechv anism for feeding a pluralityof plies of Work, of means for turning the stitched edges of the Workbetween the plies into abutting relation With each other, said meanscomprising a plunger.

4. In a sewing machine, the combination with stitching mechanism andfeeding mechanism for feeding a plurality of plies of Work, of means.for turning the stitched edges of the work between the plies intoabutting relation 'with each other, said means comprising a tiltable andshift-able device.

5. In a sewing machine, the combination with stitching mechanism andfeeding mechanism for feeding a. plurality of plies of Work, of meansfor turning the stitched edges of the work between the plies intoabutting relation with each other, said mea-ns including means forseparating the plies of Work, and a shiftaole device cooperating withsaid last means.

n a sewing machine, the combination with stitching mechanism and feedingmechanism for feeding la plurality of plies of Work, of means forturning the stitched edges of the work between the plies into abuttingrelation with each other, said means including menus for the plies ofWork, a shiftable device cooperating with said last means, and meanswhereby said shiftable device may be tilted.

In a Sewing machine, the combination with stitching mechanism andfeeding mechanism for feeding a plurality of plies of worlr, of meansfor turning the stitched edges of the work between the plies intoabutting relation with 4.means including means for separating the pliesof work, and a shifilahle device cooperating with the edge of said lastmeans.

In u sewing machine; the combination with stitching mechanism andfeeding mechanism for feeding a plurality of plies of work, of means forturning the stitched edges of the work between the plies into abuttingrelation with each other, said means including means for separating theplies of work and having a grooved portion, and a shiftable devicecoperating with such groei/ed part.

9. In a. sewing machine, the combination with stitching mechanism andfeeding mechanism for feeding a plurality of plies of Work, of means forturning the stitched edges of the work between the plies into abuttingrelation with euch other, said means including means for separating thepliesof Work and having a grooved edge and a shiftable devicevcoperating with such groored edge.

Vv10. In a sewing niacl'iine, the combination with stitching mechanismand feeding mechanism for feeding a plurality of plies each other, saidin its edge with which 11. in a machine, the combination with stitcnmgmechanism and feeding mechanism for feeding a plurality of plies ofwork, of means for turning the stitched edges of the Work Letvveen theplies into abutting relation with each other, sai@L means inclding meansfor separating the plies of Work, and a shiftable device movable'transversely to the movement of the Work and cooperating with saidmeans.

12,., ln sewing machine, the combination 'with an under feed, a top feedand stitcl'iing mechanism, of means located between said feeds forseparating a pair of plies of work, and mea-ns for turning the stitchededges of the work between the plies into abutting relation with eachother.

13. In a sewing machine, the combination with an under feed, a top feedand stitching mechanism, of means located between said feeds forseparating a pair of plies of work, and means for turning the stitchededges of the work between the plies into abutting relation with eachother, said means comprising a reciprocating plunger.

.1.4. In a sewing machine, the combina-y tion with an under feed, a topfeed and stitching mechanism, of means located between said feeds forseparating a pair of plies ofworir, and means for turning the stitchededges of the work between the plies into filmt-ting relation with eachother, said means comprising a reciprocating plunger and means wherebysaid plunger may be tilted.

i5. In a sewing machine, the combine tion with an under feed, a top feedund stitching mechanism, of meansv located between said feeds forseparating a pair of plies of Work, and means for turning the stitchededges of the Work between the plies into abutting relation with eachother, said means comprising a reciprocating plunger yand saidseparating means comprising a supplemental throat-plate having a groovecrates.

16. In a sewing machine, the combina` tion of a throat plate, a bottomfeed vand a top feed including a feed dogoperating at the rear of theneedle, and a supplemental lili) Isaid plunger cop.` v

throat plate located between said under and top feeds. 17. ln a sewingrmachine, the coxnhination of a. throat plate, a bottom feed and a topfeed including a feed dog operating :it the rear of the needle, and asupplemental tliroat plate located between said under and top feeds andhaving a groove inits side edge.

155. In a sewing machine, the combina-v tion of a bottom feed and a topfeed includ-V ing a feed dog operating at the rear of the needle, Ia suplemental throat plate located between sai under and top feeds and hav.-ing a groove in its side edge, and meansA cooperating therewith forturning the stitched edges of the work between the plies into abuttingrelation with each other.

19. In a sewing machine, the combination of stitching mechanism, abottom feed and top feed,'means located therebetween for separating aplurality of plies of work,

` trimming mechanism, and means for turning the stitched edges of thework between the plies into abutting relation iwith each other.

20. In a sewing machine, the combination of stitching mechanism, abottom feed and top feed, means located therebetween for separating aplurality of plies of work, trimming mechanism, and means for turningthe stitched edges of the work between the plies into abutting relationwith each other, and a presser foot coperating with said means.

21. In a sewing machine, the combination with' stitching mechanism andfeeding mechanism, of means located between said feeding mechanisms forseparating a pair of plies of work, and means for trimming the edges ofthe plies of work simultaneously.

22. In a sewingv machine, the combination with stitching mechanism andfeeding mechanism, of means located between said feeding mechanism forseparating a pair of plies of work, and means for trimming the edges ofthe plies of work simultaneously and comprisin a pair of trimmers eachhaving a pair o cutting edges.

23. In a sewing machine, the combination with stitching mechanism andfeeding mech-v anism, of lmeans located between said feeding mechanismsfor separating a pair of plies of Work, means for trimming the edges ofthe plies of work simultaneously, and means for turning the stitchededges of the work between the plies into abutting relation with eachother.

24. In a sewing machine, the combination with stitching mechanism andfeeding mechanism, of means located between said feeding mechanisms forseparating a pair of plies of work, means -for trimming the edges of theplies of work simultaneously and comprising a pair of trimmers eachhaving a pair of cutting edges, and a shiftable and tiltahle device forturning the stitched edges of the work "between the plies that the edgeswill abut.

25. In a sewing machine, the combination of stitching. mechanism, apresser bar and feeding mechanism including feeding means carried bysaid presser bar, and means for turning the stitched edges of the workbetween the plies into abutting relation with each other. Y

26. In a. sewing machine, the combination of stitching mechanism,feeding mech anism, means for separating a plurality of plies of workduring the feedin thereof, trimming mechanism for simu taneouslytrimming the edges-o the several plies, and means for turning thestitched edges of the work between the plies into abutting relation witheach other.

27.111 a sewing machine, the combination of stitching mechanism, feedingmecha* nism, means for separating a. plurality of plies of Work duringthe feeding thereof, trimming mechanism for simultaneously trimming theedges of. the several plies, means for turning the stitched edges of thework between the plies into abutting relation with each other, and apresser foot cooperating With said separating-means.

28. In a sewing machine, the combination of stitching mechanism, abottom feed and a top feed, a supplemental throat plate locatedtherebetween for sepa-rating a plurality of plies of work, trimmingmechanism Vfor simultaneously trimming the juxtaposed edges of theseveral plies of work, means for turning the stitched edges of the workbetween the plies into'abutting relation with each other, and a presserfoot coperating with said supplemental throat plate.

29. In a sewing' machine, the combination of stitching mechanism, abottom feed and a top feed, a supplemental throat plate locatedtherebetween for separating a plurality of plies of work', trimmingmechanism for simultaneously trimming the juxtaposed edges of theseveral plies of work, means for turning the stitched edges of the workbetween the plies into abutting relation with each other, and a. presserfoot `cooperating with said supplemental throat plate, said edge turningmeans comprising a shiftable device movable in a plane transversely tothe movement of the Work.

30. In a sewing machine, the combination with stitching mechanism anda'bottom and top feed, of a supplemental throat plate located betweensaid feeds for separating a plurality of plies of work, a presser ootlocated above said supplemental throat plate, and means forsimultaneously lifting said supplemental throat plate and presser footand separating them.

31.A In a sewing machine, the combination with stitching mechanism and abottom and top feed, of a supplemental throat plate lo cated betweensaid feeds for separating a plurality of plies of work, a presser footlocated above said supplemental throat plate,

end means fer .eimui'enecusiy supplemental tiioet plete and and aypresser' bei.

3 2. In Aa sewing machine; the ecmbietienj with stitching mecisinsm anda bottox-em top feeds of e suiirpieirientai throat plete' iot catedbetween. said ','c separating e plureity -o'f plies of Work, e foresee?foot located above Sai, supplemented throat pete, .and xnie-ene forsimultaneously .lifting seid supp'emente threetpiete and piesmi foot andseparating them? seid Ineens including a, presserv bei to which bethseid suppiemente throat piavte and presser foot are connected'.

33 in e Sewing machine, tile combination with stitching mechenisiii anda, betteln and top feed, of e suppiementei throat plete 10- catedbetween Seidl feeds for separatn e plurality of pies of werk, a pressercot leceted above suppiementei. threat plates means for simultaneouslylifting seid supplemental throat piate'and presser foot and separatingthem, and means for turning the stitched edges of the work between the'plies Se that the edges Wil abut.

In a, sewing machine, the combination with stitching media-mism and ebottom and top feeti, ef e. suppemental threat plete 1o between esitifeeds fer Separating e piui'eiity cf p'iee ef We 5:, e presser 'feet ocated above seid euppementei threat plate, means for simuitameousiy.lifting seid sup ple/mental theo-at plete and presser foot andseparating them, seid mesme iueuding a presser bar, and means forturning the .stitched edges of the Werk between the plies so that theedges Wi abut. f

35, n e, sewing meehine, the eombinetien with 'stitching iii and eeottom and top feed, of e. Supp* mente-I tiroet plete if cetei betweenseid le foi' separating a piumiity of le ,k7 e prese@ feet ie fi r1.fetai tif ugly lifting met ani 1 eee?? feet and their@ .me ne ineiedingi te which bett". eat-ifi supplemental i. feet eemecteei, `d me. fertin-if"A is e stitched edges et' plies se that the eeges n e sewingmechine, the eembinatifm with stitching mechanism and e bettom end tcpfeed; of e supplemental threat plete if cated between said feeds forseparating a. plurality of plies of Work, e presser foot iocated aboveseid Supplemental threat plate, means for simuitaneeilsgjf lifting Seideupplementai threat plate emi presser foot and separating them, Ineensfor turning the Stitched of the Werk betweeii the Se that the edges welbut, end tiimeing mecheiiiem for Sire. 1525.' teimrxiing simuiteneeeslytrii Liesheee' iiiftingfsa'il u presser foot separating them, Saidineens meufiiiig and 'numing thereof. `eg Machine, the emnbinationzeeemism :md a bottoni and Qiiepier'nens'tatheoat plate 1oif; feesie.for separetin a es ef'iterk, a presser cot eeid eeppemental thi-oatelieousiyllifting said Y pi eend preseer foot the' v "weleens neun' me?,meme ferftuning the Stitche edges ci the werk betweef; the plies sokthatebut' mail trimming mechathe ivi .mism foi: smutaneousy trimmingvthejiuttepeeed ediee ef the eeveifel plies of work prier te the#itching and intim-ning thereof. g sewing meehinehe combination Stitei'g meeianism mid e betteln and top feed?y e suppiemental threatpete1ocete bete seid feeds for separating a plurality ef plies of Week, apresser foutloceted above seid; supplemental threat plate, means forsimultaneously lifting said Supplemeuizei throat plete and presser footand separating therel5 seid means including a presser kbei* which bothsaid supplemental threat plete and presser foot are connected,- Ineensor turning the Stitched edges of the Work between; the plies so that theedges Wi eiwitel end tr'mming mechanism for ming the juxtaposed edgesei? the .Sei/'emi plies ef Work prior to the stitching and inturningthereofu Y 32h In e sewing machine, the combination of stitchingmechanism miciA feeding mecha,- nism, e pair ef throat pem located oneabove the ether, e bottom feed end aftop fee/, e pr eee feet' iocatedabove the top thi'eet *pi e, emi means fer simuteneously lifting seidtop throat Piate, top feed and pressef feci, enf?, ieeiuing a presserfoot bar te wiei the iiftebe perts are opera.-

:sel

119 em sind feeding mecha.-

et plates ieee-ted one item feed and e tcp lLoffetefi above the tcp I ine fer' simultaneously tele met pete, tcp feed and presse? and fergeemting seid piesser feet um? threat petmend incuin a presse? feet bei*te wiiieh the several ifta le parte me epe-r iieiy emeeted.

el. .in e, sewing meehzie, the combination ef stiteiiieg mechanism andfeeding mechaism., e pei? ef three-t ple-tes ocated one above Gehen e.betteln feed end e top feed2 the iatte' ineiiding a feed dog operetieeetixfely 'the rem' ef the neede, a.

feet Limited ebeve the tcp throat' pie/tei .ne fer emnitaneeusy liftingeeif teef ft piatte? top feed and reseer 4tvliiclA the several areltively connected.

` 42.-Inga sewing theemnbination 'meehamsm and, feeding meehai'sm l ,0'a pairiof throat-plates los cated one a vethe other, foot loagresser:ca above the topthroat p te, and-'imeans fo' simultaneously liftingsind top throat plate and presser foot and lfor separating said presserfoot and topthroat plate.

. v43. In a sewing machine, the combination with st'ltehin mechanism andfeeding cated above the top throat p ate, and means liftin said top,throat r separating said meludha presser bar having, connection with`sai top throatplate and presser foot. 44.f`In a sewing machine, thecombination- -meobanism and feeding A with stitching' vxn a pair ofthroat plates lo Aestesi are the other, apresser footl lo- -abut. L'-

with sti ,catedlabove the top throat plate m simultaneousl litm saidtopthroatplat and presser oot an for separating said presser footbetween plies' so-thatl the edges will 45. In a w' the combination I img,l d f mechanism, cated one above the other, a resser foot lo- In p gndmg og a pair of throat plates lof;-

h and top throat plate, and means for turnilethe stitched-edges of thework cated' above the top throat'p ate, means for 7 simultaneouslylifting said top throat'plate and presser foot and for separating saidlpresser foot and top throat plate, means `for turning the stitched edgestween the plies so that the es will abut, and trimming mechanism forsimultaneously trimming the juxtaposed edges of the several plies ofwork.

- HARRY J. DAHL. Witnesses:

Wmuau A. Sco'rr,

JOHN W. KANE.

of the work be-

